Multiply.(x7 + 7)(x7 - 7)
A. x14 + 14x7 - 49
B. x14 - 14x7 - 49
C. x14 + 49
D. x14 - 49
Answer: D
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Find the sum, if it exists.
A. - 
B. 
C. 
D. Does not exist
Find the probability.The table lists the eight possible blood types. Also given is the percent of the U.S. population having that type.
Let E be the event that a randomly selected person in the U. S. has type B blood. Let F be the event that a randomly selected person in the U. S. has RH-positive blood.Find P(F|E).
A. 0.818 B. 0.340 C. 0.720 D. 0.107
Solve the equation and check your solution.
= 
A. 0
B. 3
C. 
D. no solution
Solve the problem.The average cost per tape, in dollars, for a company to produce x sports videotapes is given by the functionA(x) = 
for x > 0
Graph the function on the interval (0, ?) and complete the following:A(x) ? 
as x ? ?.
A. 
A(x) ? 16 as x ? ?.
B. 
A(x) ? 0 as x ? ?.
C. 
A(x) ? 11 as x ? ?.
D. 
A(x) ? 1 as x ? ?.